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Soil test-based low input nutrient-management strategy: A decade experience in cassava (Manihot esculenta) in Ultisols of Kerala

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Title Soil test-based low input nutrient-management strategy: A decade experience in cassava (Manihot esculenta) in Ultisols of Kerala
Not Available
 
Creator K. SUSAN JOHN1, JAMES GEORGE2 AND J. SREEKUMAR3
 
Subject Benefit : cost ratio, Cyanogenic glucosides, Input cost, Leaf dry-matter production, Long-term fertilizer experiment, Starch, Sustainability, Tuber yield
 
Description Not Available
The research experience under a long-term fertilizer experiment (LTFE) at ICAR–CTCRI, Thiruvananthapuram,
Kerala since 1977 revealed the strong and positive response of cassava (Manihot esculenta Crantz) to manures
and fertilizers. As a part of the LTFE, since 2005, the comparison made among 4 treatments, viz. soil test-based
fertilizer recommendation (STBFR) of farmyard manure (FYM) as source of organic manure and chemical fertilizers
as inorganic source, a highest dose of N : P : K @ 125 : 50 : 125 kg/ha + FYM @ 12.5 t/ha, present Package of
Practices (PoP) recommendation of N : P : K @ 100 : 50 : 100 kg/ha + FYM @ 12.5 t/ha and absolute control
(without any manures and fertilizers) for 10 years established the superiority of STBFR over PoP and the
sustainability of cassava for continuous cultivation in the same field. The mean organic carbon, available P and K
during these years was 1.106%, 99.8 and 223.7 kg/ha, respectively, and the mean FYM, N : P : K recommendation
evolved was 7 t/ ha, 83.3 : 0 : 70.6 kg/ha, respectively, with complete omission of P and lower rate of N and K
than PoP. Under the absolute control, during these years, the tuber yield ranged from 6.58 to 18.00 t/ha with a
mean tuber yield of 14.53 t/ha. The tuber quality parameters, viz. cyanogenic glucosides (HCN) responsible for
bitterness of cassava tubers and starch content were significantly influenced by treatments with STBFR giving significantly
the lowest HCN and highest starch content. The cost benefit analysis indicated a benefit : cost ratio of
1.959 for STBFR at par with PoP (2.087) with a saving of 54.3 and 51% of input cost over the highest dose and
PoP respectively.
Not Available
 
Date 2021-08-04T06:24:22Z
2021-08-04T06:24:22Z
2018-06-01
 
Type Article
 
Identifier Not Available
0537-197X
http://krishi.icar.gov.in/jspui/handle/123456789/52862
 
Language English
 
Relation Not Available;
 
Publisher Indian Society of Agronomy